Growing Hardy Passionflower - Knowledgebase Question

Minnetonka, MN
Question by Horteditor
May 29, 2007
I've been trying to grow hardy passionflower (Passiflora incarnata) for a couple of years now. I have it in a really sheltered spot and I mulch heavily each winter, but I can't get it to survive. I know it's a Zone 6 plant, but I'm able to overwinter other Zone 6 perennials (and even a couple of shrubs) in that corner. The soil is moist, sandy loam (so it's very well-drained) and the corner is in full sun. Any tips for success?


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Answer from NGA
May 29, 2007

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It sounds as though you're doing all the right things. I wonder, though, if the soil isn't heating up enough in the spring to wake the plant up and get it off to a good start? You might try covering the bare soil with black plastic to absorb the heat. If that's a little over the edge in terms of garden design, how about laying bricks or flagstone over the bed? Anything that will absorb and then reflect heat will warm the soil up earlier in the season and make your passionflower want to grow.

Hope this works!

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